Electric mixer



FIG. 1 is a perspective view of an electric mixer according to the design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a back elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The portions of the article shown in broken line form no part of the claimed design. 

CLAIM The ornamental design for an electric mixer, as shown and described. 